JPS62132537A - Apparatus for injecting pressure sensitive adhesive - Google Patents

Abstract

PURPOSE:To make the apparatus light in weight and in compact size, and reduce noise by forming a push means with a plate parts capable of bending, and by constituting said plate parts so as to move forward in a direction of flowing out the titled adhesive against a back pressure of a piston body. CONSTITUTION:When a trigger 27 is pulled, the switch 29 is turned ON, thereby rotating a motor 54 at a prescribed speed. As an output axis 59 is fixed to the motor 54 through a clutch plate 53, the rotating speed of the motor reduces, and said speed is transferred to a rotating body 4, thereby winding a wire 5 round it. By winding the wire 5, a flat spring 3 moves forward within a U- shape groove 52 through a roller 44 while rotating counterclock-wise, thereby moving forward the push plate. The flat spring does not bend over the prescribed allowable range even if in case of generating back pressure of the adhesive in the cartridge 1. The flat spring can inject smoothly the adhesive of the cartridge 1 through the nozzle.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention provides a method for dispensing the thickening agent from a nozzle portion at the front end of the cartridge by pressing a piston body fitted to the bottom side of the cartridge filled with the thickening agent. The present invention relates to a thickener dispensing device configured to dispense a thickener.

``Prior art'' Conventionally, a cartridge filled with a coagulating or hardening organic or inorganic composition, adhesive, plasticizer, food material, or other thickening agent having tonal properties is held in a cartridge mounting part on the device side. After that, the thickening agent is poured out from the tip nozzle by pressing the piston body fitted on the bottom side of the cartridge using a pressing means that can move forward and backward in a linear direction. The device is already known, and this type of pouring device is generally called a caulking gun, and is often used to fill cracks in buildings, seal gaps, and treat joints during painting. Due to the nature of such caulking guns, it is necessary for the operator to hold and operate them, so there is a strong demand for them to be smaller, lighter, easier to operate, and more reliable in operation.

In order to satisfy this request, for example, Japanese Patent Laid-Open No. 137-1983
In 4135, a rack rod that converts the rotational motion of a DC motor driven by a built-in battery power source into linear motion via a pinion is used as a pressing means, and the piston body is pushed through a pressing plate attached to the tip of the rack rod. A thickener dispensing device configured to press has been proposed.

"Problems to be Solved by the Invention" However, in this prior art, the length of the rack rod must be at least longer than the length of the cartridge, and the rack rod is configured to protrude greatly toward the rear of the operating section when the cartridge is installed. Axial direction (rack rod advancement/retraction direction)
There are problems in that the length is longer than necessary, the overall shape is bulky, and the operability and weight balance are poor.

In order to eliminate this drawback, a second rack rod is disposed between a pair of rack rods arranged in parallel, and the second rack rod is configured so that when the pair of rack rods is advanced to a predetermined position, the rear rack rod 2 moves forward. A technique using a so-called multi-tiered rack rod has been proposed. (Japanese Patent Application Laid-open No. 59-222250) Even in this prior art, since the rack rods extending linearly in the axial direction are used, the rack rods protrude to the rear of the operating section, resulting in poor operability and weight balance. This shortcoming cannot be resolved.

However, in this prior art, three rack rods are arranged in the width direction, which inevitably increases the size of the device in the width direction, increases the weight, and also has a multi-stage configuration. There are disadvantages such as a complicated structure, and all of the above conventional techniques use rack rods, which generates a lot of noise and requires a motor with a large load capacity to drive the rack rods. For this reason, there was a limit to how much weight could be reduced, and it was completely impossible to create a caulking gun that could be operated with one hand.

The present invention is aimed at providing a caulking gun and other thickener dispensing devices that can completely eliminate the drawbacks of the prior art.

The purpose of the present invention is to achieve a thickening agent injection device that achieves significant weight reduction, miniaturization, low noise, and improved operability due to good weight balance by adopting a basic configuration that is completely different from the conventional device. In particular, the present invention can provide a lightweight caulking gun that can be operated with one hand and has good operational balance.

"Summary of the First Invention" As shown in FIG. 1, the first invention includes a pressing means for pressing the piston body 2 fitted on the bottom side of the cartridge l, which is formed of a plate-like member 3 whose arm can be bent. The plate-like member 3 is configured to be able to move forward in the thickener dispensing direction against the back pressure of the piston body.

In this case, the plate member 3 is generally preferably formed of a plate spring or other flat steel plate, or a plate steel plate curved along the thickening agent pouring direction, but is not necessarily limited to this.

When a fluid driving means is used as the driving means for advancing the plate-like member 3, for example, a plunger that can be expanded and contracted by fluid pressure is provided on the rear end side of the plate-like member 3. The plunger may be configured to be moved forward and backward by an integral extension and contraction operation, or if it is electrically driven using a motor, it can be wound around a rotating body 4 that is rotated at a reduced speed by the motor as shown in Fig. 1. Alternatively, the plate-shaped member 3 may be wound around a disc-shaped rotating body that rotates at a reduced speed, and the plate-shaped member 3 is moved forward by forward and reverse rotation of the rotating body. It may be configured to move forward and backward.

Now, if the plate-shaped member 3 has a predetermined thickness and the viscosity of the thickening agent filled in the cartridge l is low, the plate-shaped member 3 will resist the back pressure of the piston body and It is possible to move forward in the thickening agent dispensing direction without bending, but generally the cartridge 1 is filled with a highly viscous thickening agent, and the sliding movement between the piston body 2 and the cartridge 1 is difficult. Due to the existence of resistance, considerable back pressure is applied to the plate-like member 3 through the extrusion plate when the piston body 2 is pressed, and the plate-like member 3 is overcome by the back pressure and bends its arms greatly. The extrusion plate 9 attached to the tip cannot be moved forward, in other words, the viscosity agent cannot be poured out smoothly.

Therefore, in the present invention, the plate member 3 is configured to be able to move forward in the thickening agent dispensing direction against the back pressure of the piston body.

Various such configurations are possible, but for example, as shown in FIG. 1, a pair of bamboo springs 11 and 12 arranged concentrically
Using this, the large side of the bamboo shoot spring 11, 12 is fixed to the housing main body 20 side, and the tip side is fixed to the extrusion plate 9,
A narrow gap 1 formed between the bamboo shoot springs 11 and 12
By inserting the flat plate member 3 in the form of a leaf spring into the flat plate member 3, the child springs 11 and 12 prevent the arm from bending beyond a predetermined allowable width of the flat plate member 3, and the tip of the flat plate member 3 is The attached extrusion plate 9 can be moved forward, and the thickening agent can be poured out from the tip nozzle part 10.

That is, although the flat member 3 bends its arms to some extent within the cavity 13 due to the internal pressure within the cartridge 1, the arms do not bend any further because the arm bending beyond a predetermined allowable amount is prevented by the bamboo shoot springs 11 and 12. , the push-out plate 9 can be smoothly advanced against the internal pressure.

In this embodiment, since bamboo springs 11 and 12 are used, it is possible to extend the extrusion plate 9 as it moves forward, and to contract it as it moves backward.

In addition, the configuration in which the plate member 3 can move forward against the back pressure of the piston body may be achieved by using a slit-shaped guide formed in the housing in place of the bamboo springs 11 and 12, or by using the flat plate member 3. A vertical plate member erected perpendicularly to the abdominal surface of the plate member 3 is used, and the vertical plate member is configured to be able to expand or contract together with the flat plate member 3 extending following the advancement of the extrusion plate 9. Any configuration is included within the technical scope of the present invention.

"Effects of the First Invention" As described above, according to the present invention, a plate spring or other plate member 3 is used instead of a rack rod as a means for pressing the piston body 2 fitted on the bottom side of the cartridge 1. This makes it possible to achieve a significant weight reduction, and since the arm of the plate-like member 3 is bendable, when the push-out plate 9 attached to the distal end of the plate-like member 3 is retracted, the plate-like member 3 can be moved behind the operating section. not,
It is possible to store the water by winding it around a disc-shaped coil body, or it can also be stored by rotating it in a U-shape as shown in the second invention described below. Therefore, it is possible to achieve a significant improvement in operability due to miniaturization and good weight balance, and it is possible to realize a thickener dispensing device that can be operated with one hand for the first time with the present invention.

"Summary of the Second Invention" The second invention is particularly directed to an electric thickening agent dispensing device using a DC motor or an AC motor, in which the pressing means for pressing the piston body 2 is connected to the arm as in the first invention. It is formed of a bendable flat plate member (3), and as shown in FIG. 2, the flat member (3) can rotate along a guide part (52) formed concentrically with the motor (54). We propose a thickener dispensing device configured as follows.

Note that, unlike the first invention, in the second invention, the plate-like member 3
The reason for this is that when the plate member 3 is curved in order to insert the plate member 3 into the guide portion 52, the function of the guide portion 52 can be smoothly achieved. This is to prevent it from happening.

Further, after the flat member 3 goes around the guide portion 52,
The effects of the present invention are achieved by making it possible to insert a slit groove 35 extending parallel to the pressing direction of the piston body 2 into the lower side of the upper surface opening 21 into which the cartridge 1 is mounted, in other words, by making it circulate in a U-shape. can be achieved more smoothly.

Further, the flat member 3 generally moves forward via a deceleration means 4 that decelerates the driving force of the motor 54, that is, the piston body 2
In the device configured to be able to press the deceleration means 4 and the motor 54, the deceleration means 4 and the motor 54 are connected concentrically, and the flat member (3) is moved forward by the rotational movement of the deceleration means (4). By configuring this, further miniaturization can be achieved.

"Effects of the Second Invention" As described above, according to the present invention, in addition to the effects of the first invention, the flat plate shape is By rotating the member 3, the flat plate-like member 3 does not protrude significantly behind the operating section, making it possible to achieve miniaturization and a significant improvement in operability due to good weight balance.

In addition, in a preferred embodiment of the present invention, the flat member 3 is not wound around a cylindrical body or the like, but instead is wound around the cartridge 1 in a U-shape toward the distal end thereof, so that the housing shape of the caulking gun is not wasted. It is possible to further improve the weight balance and prevent distortion of the flat plate member 3 caused by winding.

"Embodiments" Hereinafter, preferred embodiments of the present invention will be described in detail by way of example with reference to the drawings. However, unless otherwise specified, the dimensions, materials, shapes, and relative arrangements of the components described in this example are not intended to limit the scope of this invention, but are merely illustrative examples. It's nothing more than that.

1 to 5 show detailed configurations of caulking guns according to embodiments of the present invention.

In the figure, the housing main body 20 has a substantially pistol-shaped shape,
It consists of an upper surface opening 21 into which the cartridge 1 can be attached, a drive unit storage section 50 disposed behind it, a hand grip section 22 and a trigger operation section 23 that hang downward from approximately the center position. As shown in FIG. 3, the upper surface opening 21 is formed into a substantially semicircular shape having a curvature substantially the same as that of the body of the cartridge 1, and extends in the axial direction so that the cartridge 1 can be attached thereto. It has a boat-like shape, and an engagement groove 24 in which the peripheral protrusion 1a of the cartridge 1 can be engaged is formed at its tip.

The hand grip portion 22 has a built-in battery power source 25.
A battery charging adapter 26 is attached to its lower open end.

A trigger-shaped trigger 27 is attached to the trigger operation section 23 so as to be movable in the push-out plate advance/retreat direction (hereinafter referred to as the axial direction), and a spring member 28 and an energization switch 29 are attached to the rear thereof.
Allocate.

A trigger bar 30 is connected to the rear wall of the bird -27, and after extending horizontally behind the trigger 27, the base end thereof is bent into an L-shape. The free end of the clutch lever 31 is engaged with the part. The clutch lever 31 is rotatably supported on a bin 32 mounted diagonally above the drive unit housing section 50, and
A coil spring 33 is attached to a midway position of the clutch lever 31 to apply an elastic force toward the clutch plate 53. Further, on the side of the clutch lever 31 facing the clutch plate 53, there is a protrusion 31 that can be engaged with the clutch groove 53a of the clutch plate 53.
a is formed.

On the other hand, a rod-shaped space 34 having a rectangular cross section is formed between the trigger operation section 23 and the top opening 21 and extends horizontally backward from the neck of the distal end of the housing body 20. A U-shaped groove 5 in which a slit groove 35 is formed on the center line through which the plate spring member 3, which is a flat plate-shaped member described above, can be inserted, and the slit groove 35 is formed on the drive unit storage section 50 side.
Connect to 2.

The drive unit storage part 50 is formed into a substantially horizontal U-shape so that it can be stored tightly along the inner wall surface of the housing main body 20, with the front side being a vertical surface, and a cylindrical drive unit mounting hole 51 at the rear center position. A U-shaped groove 52 through which the leaf spring member 3 can be inserted is concentrically formed around the outer circumference of the mounting hole 51.

Further, below the U-shaped groove 52, between the drive unit housing portion 50 and the housing body 20, there is a wire attachment groove 3 in the horizontal direction.
6 is formed, and its open end extends to the rod-shaped space 34.

Further, a drive unit storage section 50 above the U-shaped groove 52
A control mechanism such as a control board 37 and a connector 38 is housed between the housing body 20 and the housing body 20. By adjusting a dial 39 attached to the upper opening side of the housing body 20, the voltage supplied from the battery power source 25 and the A motor 54 whose current is controlled and which varies the extrusion speed of the extrusion plate.
Adjust the rotation speed.

On the other hand, on the vertical surface of the front side of the drive unit storage section 50, a cylindrical holder 40 and an inner guide 41 are attached concentrically on both upper and lower sides of the U-shaped groove 52, sandwiching the upper opening end of the U-shaped groove 52. inner circumferential side and inner guide 4
The proximal ends of the large-diameter child spring 11 and the small-diameter bamboo shoot spring 12 are fixed to the outer peripheral side of the spring 1, respectively.

Furthermore, the pair of bamboo shoot springs 11 and 12 are each fixedly installed on the back side of the extrusion plate 9, but in this embodiment, the attachment position of the extrusion plate 9 of the leaf spring member 3 and the axis of the extrusion plate 9 are The mounting positions of the bamboo shoot springs 11 and 12 are carefully designed to prevent the displacement from becoming too large.

That is, as shown in FIG. 4, in order to attach the bamboo shoot springs 11 and 12 and the leaf spring member 3 to the back side of the extruded plate 9,
The mounting cylinder 43, which is formed by connecting two large and small cylinders 43a and 43b, is fixed with its axis shifted downward from the axis of the extrusion plate 9.

As a result, when the leaf spring member 3 is advanced, its pressing force acts at a position close to the axis of the extrusion plate 9, and galling of the piston body 2 caused by a large imbalance in surface pressure can be prevented.

Now, the leaf spring member 3 disposed in the gap between the pair of bamboo shoot springs 11 and 12 goes around the U-shaped groove 52, while passing through a slit groove formed linearly below the upper surface opening 21. A support body 45 is attached to the rear end side of the roller 44 to extend along the interior of the roller 35 and rotatably support the roller 44 .

The support body 45 has a substantially rectangular shape, and is set to be slightly smaller than the rod-shaped space 34 except for the rotation position of the wire 5 to prevent rattling when moving back and forth.

The wire 5 is a wire on the lower side of the drive unit housing section 50.
5. After one end is engaged with a pin fixed in the back of the mounting groove 3B, it is extended through the lower side of the rod-shaped space 34 to the mounting position of the roller 44, and then rotates around the roller 44. It passes through the upper side of the rod-shaped space 34 and returns in the opposite direction, and is wound around the body of the rotating body 4.

Next, the cross-sectional configuration of the drive unit storage section 50 and the storage section 5
The configuration of the drive unit housed in the drive unit 0 will be explained based on FIG.

The drive unit is a DC motor 54 with variable rotation speed.
The rotating body 4 is concentrically connected to the rotating shaft of the DC motor 54, and a disc-shaped clutch plate 53 is fixed to the output shaft side of the rotating body 4.

The rotating body 4 has a cylindrical shape that is slightly smaller than the motor 54, and has an internal gear reduction mechanism that includes a sun gear 5B, a planetary gear 57, and an internal gear 58 formed on the inner peripheral surface of the rotating body 4. is built in, and its output shaft 58, that is, the sun gear 56
By fixing the sides, the rotational motion transmitted from the motor 54 is decelerated to a desired rotational speed, and the outer circumferential surface of the rotating body 4 is configured to rotate.

The clutch plate 53 has eight clutch grooves 53 on its outer peripheral surface.
a is formed symmetrically, and as described later, the trigger 2
7, the clutch lever 31 engages and disengages from the clutch groove 53a via the trigger 27.

Note that the number of the clutch grooves 53a may be four or six, but by increasing the number of clutch grooves 53a, the push-out plate 9
The response time to start extrusion becomes faster.

A storage section 50 stores the drive unit in a predetermined position.
Like the housing body 20, the wire winding guide 60 is configured to be split into two in the black direction, and extends slightly from the motor 1rsltl in the direction of the rotating body 4, and the guide 60 A space for winding the wire 5 is formed between the outer periphery of the rotating body 4 and the outer periphery of the rotating body 4.

An O-ring 61 is interposed on the outer peripheral surface of the rotating body 4 on the free end side of the wire winding guide 60 to connect the wire winding space formed between the winding guide 60 and the rotating body 4, and the wire 5 to prevent it from coming off.

A bearing 62 is also interposed between the rotating body 4 and the clutch plate 53 to prevent rattling caused by shaft contact between the two.

Now, a center hole 63 is bored in the side wall surface of the drive unit housing section 50 on the clutch plate 53 side, and the clutch plate 53 is rotatably supported via a support shaft 64 connected to the axis of the clutch plate 53. At the same time, especially in this embodiment, the support shaft 6
4 is provided with a large-diameter 09 ring 65 to position and support the space between the storage portion 50 and the clutch plate 53.

This configuration provides a buffering function in the event of backlash, interference, or shaft runout between the rotation shaft of the motor 54 and the gear train, making it possible to avoid an increase in the load on the motor 54, and to stop the motor 54. It is possible to brake the inertial rotation of the rotating body 4 caused by the internal pressure of the viscous agent in the cartridge 1 at the time, and prevent the wire 5 from sagging.

A window (not shown) is formed at a predetermined location of the storage portion 50 facing the clutch plate 53, and the clutch lever 31
The projection 31a is configured to be able to engage with the clutch groove 53a.

Next, the operation of this embodiment will be explained.

First, by pulling the trigger 27 with your finger like pulling the trigger of a pistol, the trigger bar 30 first moves backward, and following this, the clutch lever 31 rotates toward the clutch plate 53 and engages the clutch groove 53a. The clutch plate 53 can be fixed by engaging the projection 31a. Then, by further pulling the trigger 27, the energization switch 29 is turned OFF.
N, and the motor 54 rotates at a predetermined rotational speed.

When the motor 54 rotates, since the output shaft 59 is fixed via the clutch plate 53, the rotational motion of the motor 54 is decelerated and transmitted to the rotating body 4, and the wire 5
Winding is performed.

At this time, since the roller 44 attached to the rear end of the leaf spring member 3 acts as a pulley, it is possible to wind the wire 5 with 1/2 the load compared to simply winding the wire 5. Therefore, the motor 54 can be made smaller accordingly.

Then, by winding the wire 5, the leaf spring member 3 moves counterclockwise in a U-shape through the roller 44 inside the slit groove 35 and the U-shaped groove 52 formed on the outer periphery of the drive unit housing part 50. Therefore, the extrusion plate 9 can be smoothly advanced.

At this time, since the leaf spring is inserted into the gap formed between the bamboo shoot springs 11 and 12, even if back pressure of the thickening agent inside the cartridge 1 is generated, the leaf spring will not curve beyond the predetermined allowable width. This allows the thickener in the cartridge 1 to be smoothly poured out from the nozzle by overcoming the back pressure.

When the extrusion operation is to be stopped, the trigger 2
When the finger is released from 7, the spring member 28 returns to its original state due to the elastic force of the spring member 28, and after the rotation of the motor 54 is stopped by turning off the energization switch 29, the motor 54 is engaged with the trigger bar 30 in conjunction with the trigger 27. The tail clutch lever 31 rotates clockwise against the elastic force of the coil spring 33 and separates from the clutch plate 53.

As a result, the rotary body 4 in which the speed reduction mechanism is built becomes free, and as described above, the rotary body 4 rotates slightly in the opposite direction, preventing the cartridge 1 from sagging and reducing the O-ring. Further retraction can be suppressed by the braking action of 65, and as a result, the wire 5 is prevented from slacking, and the next pouring operation can be performed promptly.

After the extrusion is completed, by releasing the trigger 27, the rotating body 4 becomes free, and by retracting the extrusion plate 9 in this state, the bamboo springs 11 and 12 are contracted, and the leaf spring member 3 is retracted. While moving around inside the U-shaped groove 52 and pulling the wire 5, it moves to the tip side of the rectangular space 34, so the rotating body 4 follows this and rotates while unwinding the wire 5. These can be easily returned to their original positions.

[Brief explanation of drawings]

1 to 5 show the detailed structure of a caulking gun according to an embodiment of the present invention, in which FIG. 1 is a schematic perspective view, FIG. 2 is an overall vertical sectional view, and FIG. FIG. 4 is a cross-sectional view of the main part of the pressing means, and FIG. 5 is a partially cutaway cross-sectional view of the drive unit storage portion.

Claims (1)

[Claims] 1) A thickener dispenser configured to dispense the thickener from a nozzle at the tip of the cartridge by pressing a piston fitted to the bottom of the cartridge filled with the thickener. The device is characterized in that the pressing means is formed of a plate-like member whose arm can be bent, and the plate-like member is configured to be able to move forward in the thickener dispensing direction against the back pressure of the piston body. Thickener dispensing device. 2) In a thickening agent dispensing device configured such that a pressing means for pressing a piston body fitted on the bottom side of a cartridge filled with a thickening agent is moved forward by the driving force of a motor, the arm of the pressing means can be bent. What is claimed is: 1. A thickener dispensing device characterized in that the device is formed of a flat plate-like member, and the flat member is configured to be able to rotate along a guide portion formed concentrically with the motor. 3) The motor and a deceleration means for decelerating the driving force of the motor are concentrically connected, and the flat member is configured to move forward by rotational movement of the deceleration means. thickener dispensing device. 4) The thickener dispensing device according to claim 2, wherein the circumferential direction of the flat member is U-shaped.